If you can get the Vestfrost SE255 in the US then this is regarded as a very efficient chest freezer (A++ rating) being rated by the solar power project crowd. It is a favorite for Solar Power Freezer projects using a mains AC powered chest freezer rather the than DC powered chest freezers costing 2 or 3 times as much.

A good article on using the Vestfrost SE255 as a chest fridge (operating around 2-5 Celsius )which will consume only 0.1 KWhrs per day with the use of an additional external controller.

http://mtbest.net/chest_fridge.pdf

The VE255 can also be used of course as a Freezer using the mains electricity.